Her store makes its own flavored juices and sells vaporizers. Those products could face federal regulations.

"We're ready with whatever they throw at us. Except for if they throw such a big price tag on each flavor and each nicotine level," Engelman said.

The proposed FDA rule would force her business to apply for federal approval to sell the juices and vaporizers. That comes with a hefty fee that Engelman said would shut her business down.

There are many people who want to see businesses like these regulated by the federal government.

"I think we do a good enough job regulating ourselves. I mean, we all vape our own juice here. It is very sanitary. It's made correctly," Engelman said.

The new FDA rules also prohibit anyone under 18 from buying vapes. A measure Engelman already has in place. She is adamant the juices and vapes she sells must stay on the market.

She said she used to smoke three packs of cigarettes a day before turning to the new products. She's fearful of what will happen if shops like hers are forced to close their doors because of costly regulations.

"If these go away I see the majority of people going back to cigarettes," Engelman said.